public class Example5_3 {
   public static void main(String args[]) {
     CheapGoods cheapGoods=new CheapGoods();
     cheapGoods.newSetWeight(198);
     System.out.println("对象cheapGoods的weight的值是:"+cheapGoods.weight);
     System.out.println("cheapGoods用子类新增的优惠方法计算价格:"+cheapGoods.newGetPrice());
     cheapGoods.oldSetWeight(198.987);
     System.out.println("cheapGoods使用继承的方法（无优惠）计算价格:"+cheapGoods.oldGetPrice());
   }
}
